Nintendo Ultra64 Programmer's Manual page 204

ORI
31
ORI
0 0 1 1 0 1
6
Format:
ori rt, rs, immediate
Description:
The 16-bit
bit-wise logical OR operation. The result is placed into general register
Operation:
GPR[rt]  GPR[rs]
T:
Exceptions:
None
204
Or Immediate
26 25 21 20
rs
5
immediate
is zero-extended and combined with the contents of general register
|| (immediate or GPR[rs]
31...16
16 15
rt
5
15...0
ORI
immediate
16
rt
.
)
0
rs
in a